1 - Are there performance impacts doing this, if so what?
2 - Is there a trick to setting up shares in ESXi for the unRAID disks?
You need to pass through a controller or two and access the disks directly. You do NOT want to set up disks on a datastore.
3 - Is it difficult to migrate to a bare metal unRAID instance from unRAID on ESXi? (ya know... after the panic sets in)
I can boot my unRAID either baremetal or under ESXi. This is important as you will get zero support from Limetech and others running virtualized.
6 - Is there a version of Open-VMware-Tools for the latest version of unRAID 6.7.2?
Yes. However, there are problems with 6.7. I recommend 6.6.7.
7 - Are the custom Open-VMware-Tools available in the Community Applications?
Yes. It was recently added to CA. I try to release an updated version of Open-VM-Tools within a couple of days of a new unRAID release. Search for "openVMTools_compiled"
10 - Is viewing and managing VMs on unRAID as easy as using VM Remote Client (VMRC) and VMware vCenter Server Appliance (vCSA)?
I wouldnt run VMs on a virtualized unRAID. I use a few Dockers, but no VMs.